394109307 has 12 divisors (see below), whose sum is σ = 590353400. Its totient is φ = 262739376.

The previous prime is 394109291. The next prime is 394109363. The reversal of 394109307 is 703901493.

It is not a de Polignac number, because 394109307 - 2⁴ = 394109291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394109377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 810682 + ... + 811167.

Almost surely, 2^394109307 is an apocalyptic number.

394109307 is a deficient number, since it is larger than the sum of its proper divisors (196244093).

394109307 is an equidigital number, since it uses as much as digits as its factorization.

394109307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621864 (or 1621852 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 394109307 is about 19852.1864538897. The cubic root of 394109307 is about 733.1714814755.

The spelling of 394109307 in words is "three hundred ninety-four million, one hundred nine thousand, three hundred seven".